const: ḥēl; pl: normally masc., but often ḥaylāwān when used as an abstract idea or in reference to armies in general or in particular the hosts of Heaven. (Jacob of Sarugh, for example, regularly distinguishes betweeen ܚܝ̈ܠܐ‏ for "mighty deeds" or individual fighters and ܚܝ̈ܠܘܬܐ‏ for "armies.")
Note, then that Payne-Smith and Levy created a separate, feminine lemma accordingly, where LS2 has just one. See the citations for an example of the feminine form of the plural used with masculine concord.

Cf. also rb ḥyl. "Miracle" is probably a calque from Greek δὐναμις. Also see note s.v. ḥyl adj.
The expression חֵילֵי שְמַיָא renders Biblical Hebrew that refers undoubtedly to the astronomical divinities of the ANE, but by the time of the targums surely was understood to refer to angels.